mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 04:03:58 +08:00
c46f46d02c
In a multi-platform kernel binary we only need one early console instance. The difficulty here is that the common early console is started by early_param(), whereas the MVME16x instance is started later by config_mvme16x(). That means some interrupt setup must be done earlier. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Tested-by: Stephen N Chivers <schivers@csc.com.au> [Geert] Tag debug_cons_write() with __ref to kill section mismatch warning Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (c) 2014 Finn Thain
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/console.h>
|
|
#include <linux/init.h>
|
|
#include <linux/string.h>
|
|
#include <asm/setup.h>
|
|
|
|
extern void mvme16x_cons_write(struct console *co,
|
|
const char *str, unsigned count);
|
|
|
|
asmlinkage void __init debug_cons_nputs(const char *s, unsigned n);
|
|
|
|
static void __ref debug_cons_write(struct console *c,
|
|
const char *s, unsigned n)
|
|
{
|
|
#if !(defined(CONFIG_SUN3) || defined(CONFIG_M68360) || \
|
|
defined(CONFIG_M68000) || defined(CONFIG_COLDFIRE))
|
|
if (MACH_IS_MVME16x)
|
|
mvme16x_cons_write(c, s, n);
|
|
else
|
|
debug_cons_nputs(s, n);
|
|
#endif
|
|
}
|
|
|
|
static struct console early_console_instance = {
|
|
.name = "debug",
|
|
.write = debug_cons_write,
|
|
.flags = CON_PRINTBUFFER | CON_BOOT,
|
|
.index = -1
|
|
};
|
|
|
|
static int __init setup_early_printk(char *buf)
|
|
{
|
|
if (early_console || buf)
|
|
return 0;
|
|
|
|
early_console = &early_console_instance;
|
|
register_console(early_console);
|
|
|
|
return 0;
|
|
}
|
|
early_param("earlyprintk", setup_early_printk);
|
|
|
|
/*
|
|
* debug_cons_nputs() defined in arch/m68k/kernel/head.S cannot be called
|
|
* after init sections are discarded (for platforms that use it).
|
|
*/
|
|
#if !(defined(CONFIG_SUN3) || defined(CONFIG_M68360) || \
|
|
defined(CONFIG_M68000) || defined(CONFIG_COLDFIRE))
|
|
|
|
static int __init unregister_early_console(void)
|
|
{
|
|
if (!early_console || MACH_IS_MVME16x)
|
|
return 0;
|
|
|
|
return unregister_console(early_console);
|
|
}
|
|
late_initcall(unregister_early_console);
|
|
|
|
#endif
|